Hey sounds nice! There are a few nice musical ideas.
Here's what I personally would do differently, just my taste:
Violin - portamento transitions between notes, yeah the samples have vibrato, but transitions give this ,,flat" impression
Percussion fills - more reverb, more space, maybe even a delay echo which would really make it epic
Choir - more delayed reverb or delay (diluted with reverb) to really give it size, and push back into the mix to make it sound more distant
Orchestration - the strings are silently doubling horns octaves above, which just gives horns some unnecessary sharpness
Harmony and voicings - less fifths, they do sound repetitive at some point
Melody - I would add more drama and more elaborated melody in the middle. It doesn't feel like an epic story was told, however it would fit perfectly in a movie, like: scared and tired army marching into a demise in a dystopian landscape, like LotR
Cheers!